How to Make It
Place bread in a 13- x 9-inch baking dish. Whisk together eggs, milk, cream, vanilla, 1/3 cup of the brown sugar, and 1 teaspoon of the cinnamon in a large bowl until smooth. Pour egg mixture over bread.
Melt butter in a large skillet over medium-high. Add apples, remaining 1/3 cup brown sugar, and remaining 1 teaspoon cinnamon. Cook, stirring often, until apples begin to soften and liquid thickens into a syrup, about 8 minutes. Spoon apple mixture evenly on top of bread mixture. Sprinkle with pecans. Cover tightly with aluminum foil, and refrigerate overnight.
Preheat oven to 350°F. Bake, covered, in preheated oven 30 minutes. Remove foil, and continue baking until puffed and custard has set, about 20 minutes more. Let stand 15 minutes before serving. Serve with maple syrup, if desired.